In DGLux I need to set some large portions of the screen to yellow, or red, if things get out of range, while normally the
gauges would show exact values. Perhaps the gauge as a whole should turn orange, to attract visually when a warning needs to be fired.
Should this be performed by a separate data point referring to the measurement data point? Perhaps by a point link?

And another issue: I can't seem to find external processes as data source, like ping <hostname> ? Or some test programs of my own.
How to go about that. vmstat is a great example of what could be there.